Spirit-level.



No. 833,642. PATENTED MAR. 31 11908.

I A. W. EIGHT,

SPIRIT LEVEL. APPLICATION FILED JUL'Y a 1907.

N kit WT? imp 1 km UNITED STATES PATENT OFFICE.

ALBERT W. HIGHT, OF BALLABD, WASHINGTON, ASSIGNOR TO HUGH G. MONEN, OF TOLEDO, OHIO.

SPIRIT-LEVEL. I

Specification of Letters Patent.

Patented March 31, 1908.

To all whom it may concern: I

Be it known that I, ALBERT W. Hrerrr, a citizen of the United States, residing at Ballard, in the county of King and State of Washington, have invented a new and useful Improvement in Spirit-Levels, of which the following is a specification.

My invention relates to a spirit level, and has for its object to provide a convenient instrument of the kind, that is of simple and inex ensive construction and wherein the bub le glass is readily adjustable to accurately locate the plane of the bubble between indicating lines of the glass and parallel with planes of the body of the instrument,

whereby whenever the plane of the bubble is located between the mdicating lines, the planes of the body that are parallel therewith are also horizontal.

A further object is to. provide 'an instrument of the kind havin one or more bubble tubes that may be readily and accurately'adjusted therein to adapt the instrument for convenient and accurate use for either leveling or plumbing or both combined.

accomplish these objects by the construction and combination of arts as hereinafter described, claimed an illustrated in the drawings, in which Figure 1 is a view in side elevation of a spirit level constructed in accordance with my invention. Fig. 2 is an enlarged cross section of Fig. 1 on line 00-00. Flg. 3 is a cross section of Fig. 1 on line y y, and Fig. 4 is an enlarged broken away cross section on line 2-2 of Fig. 1.

In the drawings 1 designates the elongated rectangular body of my instrument, of suitable length and having greater breadth than.thickness, and having the parallel sides 2, the parallel sides 3 at right angles to the sides 2, and the parallel ends 4 at right angles to the sides 2 and 3.

The sides 3 are each provided with a grip groove 5, located 0 poslte each other in the sides, and central 0% bore 6 through the sides 2, and t e bore is counterbored to form the shallow annular slightly greater than the thic ess of the body 1 between the recesses 7, and at diathe body 1 is rovided a I metric points of the ring are provided opposite bores of suitable diameter, in which 1s secured diametric .of the ring, a guard tube 9,

slightly arched between the sides of the ring the tube is placed in a horizontal position.

The tube after being thus inserted is secured in position by filling the outer end ortion of the tube 9 with plaster of paris fius with the outer ends of the tube which are made flush with the periphery of the ring.

.The recesses 7 of the body 1 are provided with the annular plates 11 and 11, each of which is of an outer diameter to fit into the recess and has an inner diameter slightly less than the outer diameter of the ring 8f The plate 11 is provided with the countersunk screw orifices 12 located at regular intervals of the plate, and the plate 11 is provided with the enlarged screw orifices 18, adapted to be brought by adjustment of the plate oposite and in axial alinement with the orices 12 of the plate 11. y

The body 1 within the recesses 7 is rovided with the transverse orifices 14, w ich adjacent to the plate 11 are of a diameter to register with the screw orifices 12 of the plate 11, and from the plate 11 towards the plate v11, the orifices 14 are counterbored tothe diameter of the orifices 13 of the plate 11. In the orifices 18 and the enlar ed portion of v the orifices 14 are inserted t e screws 16 which are run into the bolts 15 and through the orifices 12 are inserted the screws 16 which are run into the bolts 15 until the ring plates 11 and 11 are drawn loosely against the sides of the body 1 within the recesses. The body 1 being then placed on a known level plane the central ring 8 is turned in the bore 6 until the incut 9 of the tube 9 is uppermost and the bubble of the tube 10 is between the index lines 17 marked circumferentially on the tube 10.

- When adjusted in this position the screws 16 are run into the screw bolts 15 until the plates 11 and 11' are drawn tightly against the body 1 at their outer circumferential portion, and against the ring 8 at their inner portion in which positionthe ring 8 is frictionally locked against turning in the bores 6 and the instrument is then adjusted for leveling.

When the instrument is to be used for both a level and a plummet, the body 1 is also provided with another bore 6 havin counterbored recesses 7, which is preferab y located at a point between the central bore '6 and the end 4 farthest from the gri grooves 5. This bore 6 is also equip ed with a ring 8 havin a guard tube 9, a bu ble 1'0, and the annu ar plates 11 and 11, which are secured in like manner as in the central bore 6, and the ring 8 is in like manner adjusted and secured with the bubble between the indicating lines 17 when the end of the body 1 nearest the rip groove 5 is resting on a level plane or w en its base plane 3 is resting a ainst a vertical lane with the arch of the tu ,e 9 uppermost. hus adjusted the instrument may be conveniently used either for plumbing or level- 111.

llo insure ressure of the annular plates 11 and 11 on the edges of the rings 8, the bottoms. 18 of the counterbores 7 are slightly dished inwards towards the orifice 6 whereby when the screws 16 and the bolts 15 are tightened on the plates 11 and 11, the outer portion of the plates are pressed on the body 1 and the inner'portions on the ed es of the ring 8, whereby the ring 8 is rig1dly held against'turning in the bore 6.

By the simple and me); ensive construction shown and described,; have produced a convenient instrument which is readily adj-ustable for accurate use either as a level or plummet, or for both purposes.

'What I claim to be new is 1. In aleveL-the combination with a body having a plane base, and a counterbored transverse orifice parallel to the plane base, of a rin rotatably mounted in the orifice, an arched ubble sight tube secured diametrically of the ring, annular plates in the counterbores, and clampin screws extending through the annular ates and the body, adapted to press the plates oppositely on the body and the rin 2. In a level, thecombination with a body having a plane base, and a counterbored transverse orifice parallel to the plane base,

of a ring rotatablymounted in the orifice, an

arched guard tube secured diametrically through the ring, the tube being provided with a sight opening in the top of the arch, a closed sight tube partly filled with spirit and arched to conform to the guard tube and secured therein with the top of the arch of the sight tube opposite the openin of the guard tu e, and provided with index 'nes, annular plates in the counterbores, and clam ing screws extending through the annular p ates and the body adapted to press the plates oppositely on the body and the ring.

In witness whereof, I have hereunto si ned my name in the presence of two subseri ing 7 witnesses,this 21st day of June, 1907.

' ALBERT W. HI-GHT.

In presence of N. A. MONGHLER, WM. J. Fnrrsonn. 

